Process of bleaching union cotton and wool goods.



FIF'SISO tum"- ea l w fi 977,848 N OF TEXTlLES & FlBERS,

UNITE STAEN FFIC.

JAMES S. ARMSTRONG, 0F LISBON, MAINE, ASSIGNOR TO FARNSWORTH COMPANY, OFLISBON, MAINE, A CORPORATION.

PROCESS OF BLEACH-TING UNION COTTON AND WOOL GOODS.

No Drawing.

To all whom it may concern.

Be it known that I, JAMES S. ARMSTRONG, a subject of Great Britain,residing at Lisbon, in the county of Androscoggin and State of Maine,have invented certain new and useful Improvements in Processes ofBleaching Union Cotton and V001 Goods, of which the following is aspecification.

This invention relates to an improved process of bleaching union cottonand wool goods. The process of treating such goods as at presentpracticed consists in first saturating the fabric with a neutral soap inthe fulling mill, so called, following the ordinary process of fullingthe goods. The goods thus saturated and impregnated with the naturalgrease of the wool and more or less foreign vegetable matter are thentransferred to the washer a quantity of water added and a lather raisedin the goods by agitating them. The goods are then thoroughly rinsed inpure Water to remove the soap. The goods are then subjected to the fumesof sulfur to complete the bleaching process.

This invention consists in subjecting the goods while in the washer tothe action of a compound or mixture formed by combining chlorid of lime,CaOCl sulfuric acid, H SO of about 66 Baum, and an alkali preferably K00 such as wood ash crystals of the anhydrous type, compounded in aboutthe proportion of fifteen pounds of chlorid of lime, two pounds fourteenand one half ounces of sulfuric acid and five pounds of alkali and aboutfifty gallons of water. The proportions may be slightly varied and stillbe within the spirit and scope of my invention. About twenty fivegallons of the compound are used to about one hundred and seventy poundsof the goods. The application of said compound to goods containinganimal fiber while in the fulling mill and saturated with grease, oiland soap, which is their condition in the fulling mill and when thecompound is applied, does not injuriously affect the animal fiber.

As is well known the goods when trans- Specification of Letters Patent.

Patented Dec. 6, 1910.

Application filed June 23, 1910. Serial No. 588,512.

ferred to for about fifteen minutes or until chemical action ceases.They are then thoroughly washed and rinsed with pure water to remove thechemicals and foreign substance. They are then submitted to the actionof sulfur fumes.

I claim 1. The herein described process of bleaching union cotton andwool goods which consists in saturating them, while charged with thenatural grease of the wool and with foreign vegetable matter, with aneutral soap, then transferring them to the washer and while in the washadding water and agitating them to raise a lather and while in the washand in the lather subjecting them to the action of a compound formed ofchlorid of lime, an alkali, sulfuric acid and water until chemicalactioncfises, then thoroughly washing and rinsing the goods and thensubjfecting them to the action of fumes of sul 2. The herein describedprocess of bleaching union cotton and wool goods which con sists insaturating them, while charged with the natural grease of the wool andwith foreign vegetable matter, with a neutral soap, then transferringthem to the washer adding water to raise a lather and then subjectingthem to a compound formed by the union of chlorid of lime and alkali,sulfuric acid and water in about the proportion of fifteen pounds ofchlorid of lime, five pounds of alkali, two pounds fourteen and one halfounces of sulfuric acid and fifty gallons of water, until chemicalaction ceases, then subj ecting them to the fumes of sulfur.

JAMES S. ARMSTRONG.

Witnesses:

CHARLES W. CooLmcE, GEORGE R. ARMSTRONG.

